My mosaic pieces have been grouted! The whole process was a lot easier than I thought it would be. Basically you make brownie mix consistency grout by adding whatever color dry grout you want and water:
Then you cover the piece with the mix:
I used a popsicle stick to spread the grout on:
let it sit for 5-10 minutes and then wipe off the excess with a dry cloth:
Sometimes you want to make your glass underneath stand out more so you can go through after it's dried & you've wiped it to define the shapes better with a sharp tool:
Fun fun! Looks like some moms I know are getting some nice Mother's Day gifts....